Tire-setter bridge-plate.



W. P. ROSE.

TIRE SETTER BRIDGE PLATE.

APPLICATION FILED FEB. a, 1912.

wwmaooeo COLUMBIA vLANonRAPn cc., V1 NNNNNNNNNNNN c WILHELM F. ROSE, OFLA MOURE, NORTH DAKOTA.

TIRE-SETTER BRIDGE-PLATE.

' Specification of Letters Patent.

Patented Apr. 15, 1913.

Application filed February 8, 1912. Serial No. 676,338.

To all whom it may concern Be it known that I, WILHELM F. Rosn, a

citizen of the United States, residing at La Moure, in the county ofLamoure, State of North Dakota, have invented certain new and usefulImprovements in Tire-Setter Bridge-Plates; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as Wlll enable others skilled in the art to which 1t appertains tomake and use the same.

This invention relates to cold tire settmg machines, more particularlyto bridge plates of machines of this type.

Hitherto it has been the custom to set a loose bridge plate between thehead blocks of the machine to support the tire during the upsettingoperation. A disadvantage results from this construction, namely, thebridge plate at times works out of place 1n its seat and necessitatesmanual replacing to accomplish the best results with the tire settingmachine. To obviate this difliculty, I provide a bridge plate in twopieces, each secured to its respective block, so that d splacement ofthe bridge plate will be prevented.

A further object of the present invention is to provide a bridge platehaving a centrally disposed slightly yielding portion so that during theupsetting operation, the tire will be upset to a greater extent 'overthis yielding portion than near the outer ends of the bridge plate sothat contrary to the usual uniform upsetting of the tire throughout thelengths of the gripping jaws, the upsetting of the tire will beconcentrated to a greater extent directly over the yielding portion ofthe bridge plate, thus permitting of the upsetting of a tire beingaccomplished more quickly than usual. To form a slightly yielding bridgeplate, I form the two sections of my bridge plate with intermeshingfingers on their opposing ends, these fingers yielding to an almostinappreciable extent during the upsetting operation, as they intermove.

With the above objects in view the invention consists in certain noveldetails of construction and combination of parts hereinafter fullydescribed and claimed, it being understood that various modificationsmay be made in the minor details of construction within the scope of theappended claim.

In the accompanying drawings forming part of this specification :-Figure1 is a longitudinal sectional view of a tire setting machine with myimproved bridge plate applied thereto. vFig. 2 is a perspective viewshowing the two parts of my improved bridge plate.

Referring now to the drawings in which like characters of referencedesignate similar parts, an ordinary cold tire upsetting machine isshown, and comprises essentially a frame 1 which supports the grippinghead blocks 2 and 3. The head block 3 is stationary while the head block2 is slidably mounted on the frame. The triangular shaped gripping jaws10 which are carried in inclined ways in the head blocks are advancedtoward each other and upset the tire. Both head blocks are suitablyrecessed in their upper faces as shown at 11 for the reception of abridge plate.

It is to be understood that the machine here shown is for the purpose ofillustration only, and comprises no part of the present invention, whichrat-her resides in a novel form of two piece bridge plate designed to beattached to the head blocks 2 .and 3 of the machine.

Referring now to Fig. 2 it will be seen that the bridge plate comprisesa pair of arcuate sections 12 and 18, the sections being mutilated toform snugly intermeshing fingers 13 and 14 at their meeting, thesefingers presenting a slightly resilient bridge as they interwork duringrelative movement of the head blocks. Each section is provided on itsconvex or reverse face with an angle iron clip 15 which is designed tobear upon the advance face of the corresponding block and be boltedthereto as shown at 16. The

sections may be made in various widths and the fingers may vary innumber to adapt the device to various conditions of service. By virtueof the closely intermeshing fingers 13 and 14 forming a slightlyresilient bridge at the meeting of the sections, the upsetting of thetire will be concentrated to a greater extent directly over thisyielding portion of the bridge plate than near the outer ends of thebridge plate contrary to the usual uniform upsetting of the tirethroughout the lengths of the gripping jaws. By virtue of thisconcentration of the upsetting of the tire to a small area of the tire,the operation of upsetting the tire on a wheel will be accomplished morequickly than usual. By virtue of the angle iron clips car ried upon thebottom faces of the sections,

there Will be no obstructions existing upon the Working faces of thesections as in the case of bolts passed Vertically through the sectionsinto the heads of the machine, Which bolts are apt to Work loose andprevent the ehicle Wheel from being placed in proper position upon thesections to'eft'ect the best results. What is claimed, is

' A bridge plate for cold tire upsetting machines including arcuatesections, an angle iron clip on the bottom face of each section forattachment to the related head block of a tire upsetting machine, aidsections having intermeshing fingers on their opposing ends, saidfingers being capable of yielding slightly during the upsettingoperation as they intermove.

In testimony whereof, I aflix my signature, in presence of twowitnesses.

\VILHELM F. ROSE. Vitnesses W. J. HUGHEs, W. R. Eves.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

